Piston core chilla and mold



M. E. TANDY PISTON CORE CHILL AND MOLD Filed Nov. 11, 1924 v gwmnto'cMaggie/mad;

Patented Feb. 23, 1926.

whit-TED MAYBEL E. TANDY, OF HANFORD, CALIFORNIA.

PISTON CORE CHILL Al l'D MOLD.

Application filed November 11 1924 Serial .No. 749,246.

To all whom it may concern:

Be it known that I, lllAYBEL Tawny,

a citizen of the United Eitates, residing at llanford, in the county ofKings and State of California, have invented certain new and usefulImprovements in Piston Core Chills and Molds; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention relates to me al founding and chiefly to the casting ofmetal pistons for internal combustion engines and provides a core chilland mold which may be readily assembled. and. easily taken apart afterthe piston has been cast, the core and mold being of metal andsustained. in proper position when assembled by means of a conteringdevice, the latter also serving as means to facilitate the withdrawal ofthe core when removing the latter from the piston.

Other objects and advantages will be apparent and suggest themselves asthe nature of the invention is understood.

While the drawings illustrate an embodiment of the invention it is to beunderstood that in adapting the same to meet different conditions andrequirements, various changes in the form, proportion and minor detailsof construction may be resorted to Without departing from the nature ofthe invention.

Referring to the accompanying drawings forming a part of thespecification,

Figure 1 is a sectional view of a piston core chill and mold embodyingthe invention.

Figure 2 is a horizontal sectional view on the line 22 of Figure 1,

Figure 3 is a horizontal sectional view on the line 3-3 of Figure 1, and

Figure 4 is a side view of the core.

Corresponding and like parts are referred to in the followingdescription and designated in the several views of the drawings by likereference characters.

The numeral 10 denotes the body of the mold, 11 the base and 12 the cap,the latter having a centrally disposed opening and a boss 13 in linewith the opening, both the cap and the base having its marginalportioncountersunk to receive opposite ends of the body 10. The base 11 isprovided with a central opening 14- to receive a centering pin 15whereby the core is properly positioned and held from displacement. V

The core is 'of sectional. formation and may consist of cast iron,steel, copper or other suitable metal and comprises a center piece 16and quarter sections 17, the center piece 16 forming a wedge to hold thequarter sections 17 in proper relationship to form the core. Half roundnotches 18 are formed in the meeting edges of corresponding quartersections 17 and result in the formation of the bosses which receive theends of the wrist pin, whereby the connecting rod is attached to thepiston. A transverse slot 19 is formed in the upper end of the centerpiece 16 and registers with spaces20 formed. between the upper ends ofcorresponding core sections 1? and this slot 19 and spaces 20 receivethe metal which forms the bracing web which connects the wrist pinbosses of the piston. The centering pin 15 is threaded into an opening21 formed in the lower end of the center piece 16 and also serves asconvenient means for withdrawing the center piece from the piston afterthe latter has been cast so that the quarter sections 1'? may be movedinwardly to clear the piston bosses preliminary to withdrawing the coresections 17 from the piston.

l i hat is claimed is:

1. A sectional chill and core for a piston casting mold the samecomprising a center section and quarter sections at opposite sides ofthe center section, the latter being of wedge formation to. facilitateits Withdrawal, corresponding quarter sections having matching notchesto form wrist pin receiving bosses and the quarter sections beingapplicable and removable by direct lat eral movement.

2. A sectional chill and core for a piston casting mold the samecomprising a center section and uarter sections of substantially thesame ength as the center section at opposite sides of the centersection, said quarter sections being applicable and removable by directlateral movement, corresponding quarter sections having matching notchesto formwvrist pin receiving bosses, the center piece having a transverseslot in its upper end and the meeting edge portions of the quartersections being cut away to provide spaces which register with saidtransverse slots whereby to forin a reinforcing web for said Wrist pinbosses.

3. A piston mold comprising a body, a

nipple or boss in line with said opening toj receive the molten metalwhen pouring, the piston.

l. A piston mold comprising; a. 'body', a cap, a lmsc' closing thebottom of said body, both the cap and base having marginal portionscountersunk to receive corresponding ends of the body, the base havingan opening to receive the centering pin of a core, and the cap having acentral opening and e nipple or boss in, line with said opening toreceive the n'i'olton metal when pore" piston, and a sectional corecompri i :1 center piece of: Wedge lorm and (punter secter sectionshaving matching notches in ()p posing sides and having portions cut awayto provide recesses to register with the transverse slot in the upperend of the center piece;

In testimony whereof I afin; in'y signature MAYBEL E. TANDY

